| Date | Event | Description |
|---|---|---|
| 15 May 2012 | Amended | Update search of Cochrane Schizophrenia Group's Trial Register (see Search methods for identification of studies). 7 studies added to awaiting assessment |
| 5 October 2011 | Amended | Contact details updated. |
| 4 August 2010 | Amended | Contact details updated. |
| 15 February 2010 | Amended | Contact details updated. |
| 13 August 2008 | Amended | Contact Author details updated |
| 25 April 2008 | Amended | Converted to new review format. |
| 14 November 2006 | New citation required and conclusions have changed | Substantive amendment |
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